Air-valve for radiators.



1?. W. LEUTHESSER.

AIR VALVE FOR RADIATORS.

APPLIUATION FILED 13150.20, 1 911.

1,062,407; Patented May 20, 1913.

IN1/enforof air in the manner well known by those skilled in the art.

A ring like member' 20 is located in the lower end of the shell or casing which forms an abutment or seat for the flat lower end 18 of the expansion member, the fiat lower end of the expansion member being always in engagement with the fiat face 26 of the lower abutment there never is any appreciable escapement of steam past the lower end' of the expansible member since the configuration of these surfaces is such as to practically insure a correct engagement therebetween. The lower ring-like member or abutment, as shown, is provided with an opening 9.1 communicating with the nipple 14 and with the opening 16 in the expansion post. The lower ring-like member 2O is formed with a shoulder 22, which engages with a shoulder 23 in the valve casing, the engagement of the shoulders holding the ring-like member against movement toward the expansion post. This ring-like member 20 has a free or sliding t within the valve casing and is, therefore, readily removable from the interior of the casing. F rom a study of the drawings, it will also be seen that the expansion post 15 is in a free or loose condition within the valve casing, and by free or loose is meant that it is not positively attached or secured' to any other portion of the valve mechanism. Tt is, therefore, obvious that with the expansion post in a loose condition .within the casing, and the lower abutment for said post readily removable from the casing, the removal of the expansion post from the interior of the casing would be a simple matter when the means for locking the lower abutment in place are removed. The lower abutment is held in place by the engagement of the upper end of the nipple 14 with the lower end of the lower abutment. This nipple 111, when the valve is placed in operative position, is attached to the upper end of thereturn pipe, and, therefore, to all practical intents and purposes, it is a portion of the return pipe and may be consideredv in describing it as the upper end of the return pipe, although it is a portion made independently of the return pipe and is attached thereto when the valve is connected up.

`When it is desired to remove the expansion post from the interior of the casing for the purpose of blowing-out thesystem, the union nut 13 is unscrewed from the lower end of the casing, after which the end of the return pipe can be swung to one side of the lower end of the valve casing and the lower abutment 2O andv expansible member will then fall out because of the loose condition in which they are held within the casing.

It is then a simple matter to couple up the valve casing with the upper end of the return pipe, after which the blowing-out of the system can be eli'ected without injury to the expansible members. Then, by the same operation which has heretofore been described, except taking the steps in reverse order, the expansible member can be re` placed within the casing and the system is then ready for iinal operation. This very simple manner of enabling the removal of the expansible member eliminates all the waste of time and energy heretofore necessary in this operation; and, furthermore, the expansion posts when returned to the casing will be in the same posit-ion of adjustment with respect to the abutments as they were before they were removed, so that after such removal any re-adjustment of the parts is not necessary.

In order to correctly center the expansible member within the casing and stiften the same thus preventing buckling or warping,

the abutment has extending therefrom aL hollow metallic tube 27 which lies within the opening 16 in the expansible member.

T claim:

Tn an air valve for radiators the combi- 1nation of a casing having an outlet in the lower end thereof and an inlet intermediate the ends thereof, an expansible member within the casing, having a tapered upper end and a flat lower end and provided with a central longitudinal bore, an upper adjustable abutment for said member, located above said inlet, and provided with a tapered opening to receive said tapered upper end of the expansible member, a ring like abutment for the lower end of said member provided with a fiat Iseating' face for said flat lower end and with a central bore in alinement with the bore of the expansible member, said expansible member being freely detachable from said abutments, said casing having a shoulder adjacent its lower end, said ring like abutment being cut away I to provide a shoulder to engage therewith, and formed to have a sliding fit within said casing, a tube centrally extending from the lower abutment and entering the bore in the expansible member, a circumferential flange around the lower end of the lower abutment, a nipple having a tapered upper end arranged to engage said flange and a nut for j oiningsaid nipple to said casing and forming the sole means of holding said lower abutment and expansible member in place, substantially as described.

FRED W. LEUTHESSER. Vitnesses FRANCES M. FROST, lNM. P. BOND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

